* {
    margin: 0;
    padding: 0;
}

body ul li {
    list-style: none;
}

nav {
    height: 40px;
}

.nav-top {
    padding: 10px;
    margin: 0 auto;
    width: 660px;
}

.nav-top ul {
    height: 30px;
    width: 660px;
}

.nav-top li {
    width: 100px;
    margin-right: 10px;
    float: left;
    background: rgba(175, 228, 253, 0.98);
    border-radius: 5px 5px 0 0;
    text-align: center;
}

.nav-top ul li a {
    display: block;
    height: 30px;
    text-decoration: none;
    line-height: 30px;
}
